Examine source code of ClearURLs

{
  "manifest_version" : 2 ,
  "name" : "ClearURLs",
  "version" : "1.27.3",
  "author": "Kevin Roebert",
  "description" : "__MSG_extension_description__" ,
  "homepage_url" : "https://docs.clearurls.xyz",
  "default_locale" : "en" ,
  "content_security_policy" : "script-src 'self'; object-src 'none'",
  "browser_specific_settings": {
    "gecko": {
      "id": "{74145f27-f039-47ce-a470-a662b129930a}"
    }
  },
  "icons" : {
    "16" : "img/clearurls_16x16.png",
    "19" : "img/clearurls_19x19.png",
    "20" : "img/clearurls_20x20.png",
    "24" : "img/clearurls_24x24.png",
    "30" : "img/clearurls_30x30.png",
    "32" : "img/clearurls_32x32.png",
    "38" : "img/clearurls_38x38.png",
    "48" : "img/clearurls_48x48.png",
    "64" : "img/clearurls_64x64.png",
    "96" : "img/clearurls_96x96.png",
    "128" : "img/clearurls_128x128.png"
  },
  "browser_action" : {
    "browser_style": true,
    "default_icon" : {
      "16" : "img/clearurls_16x16.png",
      "19" : "img/clearurls_19x19.png",
      "20" : "img/clearurls_20x20.png",
      "24" : "img/clearurls_24x24.png",
      "30" : "img/clearurls_30x30.png",
      "32" : "img/clearurls_32x32.png",
      "38" : "img/clearurls_38x38.png",
      "48" : "img/clearurls_48x48.png",
      "64" : "img/clearurls_64x64.png",
      "96" : "img/clearurls_96x96.png",
      "128" : "img/clearurls_128x128.png"
    },
    "default_title" : "ClearURLs Add-on",
    "default_popup" : "html/popup.html"
  },
  "permissions" : [
    "<all_urls>" ,
    "webRequest" ,
    "webRequestBlocking" ,
    "storage" ,
    "unlimitedStorage" ,
    "contextMenus" ,
    "webNavigation" ,
    "tabs" ,
    "downloads" 
  ],
  "background" : {
    "scripts" : [
      "browser-polyfill.js" ,
      "core_js/utils/Multimap.js" ,
      "core_js/utils/URLHashParams.js" ,
      "core_js/message_handler.js" ,
      "external_js/ip-range-check.js" ,
      "core_js/tools.js" ,
      "core_js/badgedHandler.js" ,
      "core_js/pureCleaning.js" ,
      "core_js/context_menu.js" ,
      "core_js/historyListener.js" ,
      "clearurls.js" ,
      "core_js/storage.js" ,
      "core_js/watchdog.js" ,
      "core_js/eTagFilter.js" 
    ]
  },
  "content_scripts" : [
    {
      "all_frames" : true ,
      "matches" : [
        "*://*.google.com/*" ,
        "*://*.google.ad/*" ,
        "*://*.google.ae/*" ,
        "*://*.google.com.af/*" ,
        "*://*.google.com.ag/*" ,
        "*://*.google.com.ai/*" ,
        "*://*.google.al/*" ,
        "*://*.google.am/*" ,
        "*://*.google.co.ao/*" ,
        "*://*.google.com.ar/*" ,
        "*://*.google.as/*" ,
        "*://*.google.at/*" ,
        "*://*.google.com.au/*" ,
        "*://*.google.az/*" ,
        "*://*.google.ba/*" ,
        "*://*.google.com.bd/*" ,
        "*://*.google.be/*" ,
        "*://*.google.bf/*" ,
        "*://*.google.bg/*" ,
        "*://*.google.com.bh/*" ,
        "*://*.google.bi/*" ,
        "*://*.google.bj/*" ,
        "*://*.google.com.bn/*" ,
        "*://*.google.com.bo/*" ,
        "*://*.google.com.br/*" ,
        "*://*.google.bs/*" ,
        "*://*.google.bt/*" ,
        "*://*.google.co.bw/*" ,
        "*://*.google.by/*" ,
        "*://*.google.com.bz/*" ,
        "*://*.google.ca/*" ,
        "*://*.google.cd/*" ,
        "*://*.google.cf/*" ,
        "*://*.google.cg/*" ,
        "*://*.google.ch/*" ,
        "*://*.google.ci/*" ,
        "*://*.google.co.ck/*" ,
        "*://*.google.cl/*" ,
        "*://*.google.cm/*" ,
        "*://*.google.cn/*" ,
        "*://*.google.com.co/*" ,
        "*://*.google.co.cr/*" ,
        "*://*.google.com.cu/*" ,
        "*://*.google.cv/*" ,
        "*://*.google.com.cy/*" ,
        "*://*.google.cz/*" ,
        "*://*.google.de/*" ,
        "*://*.google.dj/*" ,
        "*://*.google.dk/*" ,
        "*://*.google.dm/*" ,
        "*://*.google.com.do/*" ,
        "*://*.google.dz/*" ,
        "*://*.google.com.ec/*" ,
        "*://*.google.ee/*" ,
        "*://*.google.com.eg/*" ,
        "*://*.google.es/*" ,
        "*://*.google.com.et/*" ,
        "*://*.google.fi/*" ,
        "*://*.google.com.fj/*" ,
        "*://*.google.fm/*" ,
        "*://*.google.fr/*" ,
        "*://*.google.ga/*" ,
        "*://*.google.ge/*" ,
        "*://*.google.gg/*" ,
        "*://*.google.com.gh/*" ,
        "*://*.google.com.gi/*" ,
        "*://*.google.gl/*" ,
        "*://*.google.gm/*" ,
        "*://*.google.gp/*" ,
        "*://*.google.gr/*" ,
        "*://*.google.com.gt/*" ,
        "*://*.google.gy/*" ,
        "*://*.google.com.hk/*" ,
        "*://*.google.hn/*" ,
        "*://*.google.hr/*" ,
        "*://*.google.ht/*" ,
        "*://*.google.hu/*" ,
        "*://*.google.co.id/*" ,
        "*://*.google.ie/*" ,
        "*://*.google.co.il/*" ,
        "*://*.google.im/*" ,
        "*://*.google.co.in/*" ,
        "*://*.google.iq/*" ,
        "*://*.google.is/*" ,
        "*://*.google.it/*" ,
        "*://*.google.je/*" ,
        "*://*.google.com.jm/*" ,
        "*://*.google.jo/*" ,
        "*://*.google.co.jp/*" ,
        "*://*.google.co.ke/*" ,
        "*://*.google.com.kh/*" ,
        "*://*.google.ki/*" ,
        "*://*.google.kg/*" ,
        "*://*.google.co.kr/*" ,
        "*://*.google.com.kw/*" ,
        "*://*.google.kz/*" ,
        "*://*.google.la/*" ,
        "*://*.google.com.lb/*" ,
        "*://*.google.li/*" ,
        "*://*.google.lk/*" ,
        "*://*.google.co.ls/*" ,
        "*://*.google.lt/*" ,
        "*://*.google.lu/*" ,
        "*://*.google.lv/*" ,
        "*://*.google.com.ly/*" ,
        "*://*.google.co.ma/*" ,
        "*://*.google.md/*" ,
        "*://*.google.me/*" ,
        "*://*.google.mg/*" ,
        "*://*.google.mk/*" ,
        "*://*.google.ml/*" ,
        "*://*.google.com.mm/*" ,
        "*://*.google.mn/*" ,
        "*://*.google.ms/*" ,
        "*://*.google.com.mt/*" ,
        "*://*.google.mu/*" ,
        "*://*.google.mv/*" ,
        "*://*.google.mw/*" ,
        "*://*.google.com.mx/*" ,
        "*://*.google.com.my/*" ,
        "*://*.google.co.mz/*" ,
        "*://*.google.com.na/*" ,
        "*://*.google.com.nf/*" ,
        "*://*.google.com.ng/*" ,
        "*://*.google.com.ni/*" ,
        "*://*.google.ne/*" ,
        "*://*.google.nl/*" ,
        "*://*.google.no/*" ,
        "*://*.google.com.np/*" ,
        "*://*.google.nr/*" ,
        "*://*.google.nu/*" ,
        "*://*.google.co.nz/*" ,
        "*://*.google.com.om/*" ,
        "*://*.google.com.pa/*" ,
        "*://*.google.com.pe/*" ,
        "*://*.google.com.pg/*" ,
        "*://*.google.com.ph/*" ,
        "*://*.google.com.pk/*" ,
        "*://*.google.pl/*" ,
        "*://*.google.pn/*" ,
        "*://*.google.com.pr/*" ,
        "*://*.google.ps/*" ,
        "*://*.google.pt/*" ,
        "*://*.google.com.py/*" ,
        "*://*.google.com.qa/*" ,
        "*://*.google.ro/*" ,
        "*://*.google.ru/*" ,
        "*://*.google.rw/*" ,
        "*://*.google.com.sa/*" ,
        "*://*.google.com.sb/*" ,
        "*://*.google.sc/*" ,
        "*://*.google.se/*" ,
        "*://*.google.com.sg/*" ,
        "*://*.google.sh/*" ,
        "*://*.google.si/*" ,
        "*://*.google.sk/*" ,
        "*://*.google.com.sl/*" ,
        "*://*.google.sn/*" ,
        "*://*.google.so/*" ,
        "*://*.google.sm/*" ,
        "*://*.google.sr/*" ,
        "*://*.google.st/*" ,
        "*://*.google.com.sv/*" ,
        "*://*.google.td/*" ,
        "*://*.google.tg/*" ,
        "*://*.google.co.th/*" ,
        "*://*.google.com.tj/*" ,
        "*://*.google.tk/*" ,
        "*://*.google.tl/*" ,
        "*://*.google.tm/*" ,
        "*://*.google.tn/*" ,
        "*://*.google.to/*" ,
        "*://*.google.com.tr/*" ,
        "*://*.google.tt/*" ,
        "*://*.google.com.tw/*" ,
        "*://*.google.co.tz/*" ,
        "*://*.google.com.ua/*" ,
        "*://*.google.co.ug/*" ,
        "*://*.google.co.uk/*" ,
        "*://*.google.com.uy/*" ,
        "*://*.google.co.uz/*" ,
        "*://*.google.com.vc/*" ,
        "*://*.google.co.ve/*" ,
        "*://*.google.vg/*" ,
        "*://*.google.co.vi/*" ,
        "*://*.google.com.vn/*" ,
        "*://*.google.vu/*" ,
        "*://*.google.ws/*" ,
        "*://*.google.rs/*" ,
        "*://*.google.co.za/*" ,
        "*://*.google.co.zm/*" ,
        "*://*.google.co.zw/*" ,
        "*://*.google.cat/*" 
      ],
      "include_globs": [
        "http?://www.google.*/",
        "http?://www.google.*/#hl=*",
        "http?://www.google.*/search*",
        "http?://www.google.*/webhp?hl=*",
        "https://encrypted.google.*/",
        "https://encrypted.google.*/#hl=*",
        "https://encrypted.gogole.*/search*",
        "https://encrypted.google.*/webhp?hl=*",
        "http?://ipv6.google.com/",
        "http?://ipv6.google.com/search*"
      ],
      "js" : [
        "core_js/google_link_fix.js" 
      ],
      "run_at" : "document_end" 
    },
    {
      "all_frames" : true ,
      "matches" : [
        "*://*.yandex.ru/*" ,
        "*://*.yandex.com/*" ,
        "*://*.ya.ru/*" 
      ],
      "js" : [
        "core_js/yandex_link_fix.js" 
      ],
      "run_at" : "document_end" 
    }
  ],
  "options_ui" : {
    "page": "html/settings.html" 
  }
}